Suppression of thermally excited capillary waves by shear flow
| Autor: | Henk N. W. Lekkerkerker, Daniel Bonn, Dirk G. A. L. Aarts, Didi Derks, Arnout Imhof |
|---|---|
| Přispěvatelé: | Soft Matter (WZI, IoP, FNWI), Colloïden en grenslagen, Dep Natuurkunde, Dep Scheikunde |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Temperature General Physics and Astronomy Mechanics Pure shear Capillary number Capillaries Solutions Simple shear Shear modulus Shear rate Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Kinetics Classical mechanics Capillary length Shear stress Colloids Gases Stress Mechanical Shear Strength Shear flow |
| Zdroj: | Physical Review Letters, 97. American Physical Society |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | We investigate the thermal fluctuations of the colloidal gas-liquid interface subjected to a shear flow parallel to the interface. Strikingly, we find that the shear strongly suppresses capillary waves, making the interface smoother. This phenomenon can be described by introducing an effective interfacial tension that increases with the shear rate. The increase of sigma(eff) is a direct consequence of the loss of interfacial entropy caused by the flow, which affects especially the slow fluctuations. This demonstrates that the interfacial tension of fluids results from an intrinsic as well as a fluctuation contribution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|